JP3154095B2 - Liquid crystal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a liquid crystal device having a liquid crystal cell, and more particularly, to a technique for protecting a liquid crystal cell from impacts or the like.

[0002]

2. Description of the Related Art Conventionally, in a liquid crystal device in which a liquid crystal cell is fixed to a frame, in order to prevent shocks and vibrations applied to the liquid crystal device from being transmitted to the liquid crystal cell, the orientation of the liquid crystal is changed and the image quality is not deteriorated. The following method of fixing a liquid crystal cell is adopted.

FIGS. 13 and 14 are a cross-sectional view and a plan view of a liquid crystal device, respectively. The liquid crystal device mainly includes a cell 1, a glass plate 2, a support frame 3, a backlight 10, and a backlight 1.
And a main frame 11 for accommodating “0”. Note that the cell 1 is configured by sandwiching a liquid crystal between two glass substrates.

As shown in FIG. 15, the support frame 3 has a frame shape with a central portion cut out, and has a connection portion 12 around the periphery for connection to a main frame 11. In addition, as shown in FIG. 16, the main frame 11 includes a similar connection portion 12. Then, the support frame 3 and the main frame 11 are connected to each other as shown in FIG.
The two parts are fixed with screws or the like.

[0005] The support frame 3 and the glass plate 2 are bonded to each other with an adhesive at their contact surfaces to form a front frame 4.
Is composed.

[0006] The cell 1 is fixed to the glass plate 2 via an elastic supporting member 5. The support member 5
Is fixed to the entire periphery of the cell 1 and the glass plate 2 by an adhesive as shown in FIG.

In the liquid crystal device having such a configuration, since the cell 1 and the glass plate 2 are adhered to each other via the elastic supporting member 5, external shocks and vibrations transmitted through the main frame 11 are transmitted to the cell 1. Has the advantage of not being transmitted much. This prevents the occurrence of alignment defects due to impact, which is a problem in the liquid crystal cell.

[0008]

In the liquid crystal device having the above structure, when a shock is applied to the main frame 11,
The stress wave propagates from the main frame 11 to the glass plate 2 with almost no attenuation. For this reason, the attenuation of the stress wave is performed only by the support member 5, but conventionally, it has not always been possible to sufficiently prevent the occurrence of the alignment defect of the liquid crystal. In particular, when a ferroelectric liquid crystal was used as the liquid crystal, the alignment of the liquid crystal was liable to change due to the shock or vibration of the cell, and this was one of the major causes of the alignment defect of the liquid crystal and, consequently, the deterioration of the image quality. .

In view of the above circumstances, an object of the present invention is to provide a more reliable liquid crystal device which sufficiently suppresses the occurrence of alignment defects of liquid crystal when an impact is applied to a main frame or a support frame. It is assumed that.

[0010]

The structure of the present invention to achieve the above object is as follows.

That is, the present invention provides a cell in which a liquid crystal is sandwiched between a pair of substrates on which electrodes are formed, and a cell attached to the cell via an elastic supporting member so as to cover the cell. In a liquid crystal device having a glass plate provided, a support frame bonded to the glass plate, and a main frame connected to the support frame, a hole is provided near a connection portion of the support frame with the main frame. Is opened, the liquid crystal device.

According to the present invention, it is possible to remove a stress wave transmitted to the cell at a short transmission distance from the main frame (ie, a stress wave that is not sufficiently attenuated). That is, in the present invention, by previously making holes in the vicinity of the connecting portion and the main frame supporting region frame, it is possible to increase the transmission distance to bypass the stress waves transmitted into the cell from the main frame, the cell Can be sufficiently attenuated. As a result, the occurrence of alignment defects in the liquid crystal cell due to the impact of the main frame can be more reliably prevented.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a support frame main frame is provided.
Make a hole near the connection to the frame and
The support member that fixes the glass plate and the cell is
It may be provided dispersedly in a region away from the connection part of the frame .

As the elastic support member used in the present invention, for example, rubber or gel can be used.
Further, as the cross-sectional shape, any shape other than a rectangle or a circle can be selected, but when the support member is locally provided, for example, only near the four corners of the cell,
Since the rigidity of the entire supporting member is insufficient and the supporting member is easily deformed when the stress wave is transmitted, it is preferable to use a member having a geometric rigidity in order to prevent this.

In the present invention, the shape of the hole provided in the vicinity of the connection portion between the support frame and the main frame is not particularly limited. For example, the shape may be any other shape such as a rectangle or an oval. Can be. The size of the hole is set so that the stress wave transmitted from the main frame to the cell can be bypassed, the transmission distance can be sufficiently long, and the stress wave transmitted to the cell can be sufficiently attenuated. You.

In the present invention, the type of liquid crystal used in the cell is not particularly limited. However, since the orientation of a ferroelectric liquid crystal is liable to change due to shock or vibration, application of the present invention is significant. .

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below.

Reference Example 1 FIGS. 1 and 2 are a longitudinal sectional view and a plan view, respectively, showing the structure of a liquid crystal device according to this reference example.

The liquid crystal device according to the present embodiment, as shown in FIG. 1, mainly cell 1, from the glass plate 2, the support frame 3, a main frame 11 supporting member 5, and the backlight 10 having elasticity is housed It is configured.

The support frame 3 and the main frame 11 are the same as those shown in FIGS. 15 and 16, respectively.
Can be connected by screws or the like as shown in FIG.

The support frame 3 and the glass plate 2 are bonded together by an adhesive at their contact surfaces to form a front frame 4.
Is composed.

The cell 1 is constituted by sandwiching a ferroelectric liquid crystal between two glass substrates. The cell 1 and the glass plate 2 are connected to each other via a support member 5 bonded to each other with an adhesive. As shown in FIG. 2, the support members 5 are dispersed in a region of the support frame 3 and the main frame 11 distant from the connection portion 12, and
Is provided along the outer periphery of the, in this reference example,
Rubber having a rectangular cross section was used as the support member 5.

After the cell 1, the glass plate 2 and the support frame 3 are bonded as described above, the support frame 3 is
0 was connected to the main frame 11 in which the liquid crystal device was stored.

[0024] In the liquid crystal device of the present embodiment, when an impact is applied to the main frame 11, the connecting portion 12 stress wave is a fixed position of the support frame 3 with respect to the main frame 11
From the support frame 3 to the glass plate 2
And finally transmitted to the cell 1 via the elastic supporting member 5. At this time, the stress wave is attenuated during the transmission process, and the rate of attenuation increases as the distance of the transmission path increases.

[0025] In the present embodiment, since the vicinity of the connecting portion 12 as shown in FIG. 2 not installed the support member 5,
The stress wave cannot be transmitted to the cell 1 from the connection portion 12 in a linearly short transmission distance, but is transmitted to the cell 1 via the support member 5 by bypass. Therefore, the stress wave transmitted to the cell 1 without being sufficiently attenuated can be eliminated, and as a result, the occurrence of the alignment defect of the liquid crystal is suppressed.

(Embodiment 1 ) FIGS. 3 and 4 are a longitudinal sectional view and a plan view, respectively, showing the structure of a liquid crystal device according to the present embodiment. The same reference numerals as those in FIGS. The same members are shown.

As shown in FIG. 5, the support frame 3 has a frame shape in which a central portion is cut out, and has a connection portion 12 for connection to a main frame 11 around the periphery. Also,
A hole 6 is formed near the connection portion 12.

The main frame 11 is the same as that shown in FIG. 16, and can be connected to the support frame 3 at the connecting portions 12 by screws or the like as shown in FIG.

The supporting frame 3 and the glass plate 2 are bonded together by an adhesive at their contact surfaces, and the front frame 4
Is composed.

The cell 1 is formed by sandwiching a ferroelectric liquid crystal between two glass substrates. The cell 1 and the glass plate 2 are connected to each other via a support member 5 bonded to each other with an adhesive. As shown in FIG. 4, the support member 5 is provided over the entire outer periphery of the cell 1. In the present embodiment, rubber having a rectangular cross section is used as the support member 5.

After the cell 1, the glass plate 2 and the support frame 3 are bonded as described above, the support frame 3 is
0 was connected to the main frame 11 in which the liquid crystal device was stored.

In this embodiment, since the hole 6 is formed near the connecting portion 12 of the support frame 3 with the main frame 11, the stress wave when an impact is applied to the main frame 11 is reduced. Cell 1 with a short linear transmission distance from
Is transmitted to the cell 1 via the support member 5 by being dispersed / bypassed, so that the vibration energy can be diffused and the transmission distance becomes longer, so that the cell 1 is not sufficiently attenuated. Can be eliminated, and as a result, the occurrence of alignment defects in the liquid crystal can be suppressed.

Embodiment 2 FIG. 7 shows a plan view of a liquid crystal device according to this embodiment. In the present embodiment, the reference example 1 and the embodiment 1 are combined, and the support members 5 for fixing the glass plate 2 and the cell 1 are provided separately in a region away from the connection portion 12 between the support frame 3 and the main frame 11. Connecting portion 12 of support frame 3 to main frame 11
A hole 6 is provided in the vicinity.

According to this embodiment, the stress wave when an impact is applied to the main frame 11, Reference Example 1 and Examples
1 and is transmitted to the cell 1 via the support member 5 by detouring more largely than in the case of No. 1 . For this reason, the occurrence of alignment defects in the liquid crystal can be suppressed more reliably.

[0035] (Reference Example 2) FIGS. 8 and 9 are a longitudinal sectional view and a plan view showing a structure of a liquid crystal device according to the reference example, respectively, those reference characters the same in FIGS. 1 and 2 The same members are shown.

The support frame 3 and the main frame 11 are the same as those shown in FIGS. 15 and 16, respectively.
Can be connected by screws or the like as shown in FIG.

The support frame 3 and the glass plate 2 are bonded together at their contact surfaces with an adhesive to form the front frame 4.
Is composed.

The cell 1 is constructed by sandwiching a ferroelectric liquid crystal between two glass substrates. The cell 1 and the glass plate 2 are connected to each other via a support member 5 bonded to each other with an adhesive. The support member 5, as shown in FIG. 9, is provided on the four corners of the cell 1, in this reference example, FIG as the support member 5 10
Rubber having the shape shown in FIG. Note that FIG.
10A is a sectional view, and FIG. 10B is a plan view.

[0039] In this reference example, since the provided locally the support member 5 to the four corners of the cell 1 away from the connecting portion 12, the stress wave when an impact is applied to the main frame 11, the connecting portion It cannot be transmitted to the cell 1 linearly and shortly from the transmission distance 12, but is transmitted to the cell 1 via the support member 5 by-passing. Therefore, the cell 1 is not sufficiently attenuated.
Can be eliminated, and as a result, the occurrence of alignment defects in the liquid crystal can be suppressed.

[0040] When the support member 5 as in this reference example was locally provided, when the stress wave is transmitted from the front frame 4 is insufficient stiffness of the entire support member 5, the support member 5 is excessively deformed, but the risk of such interference between the cells 1 and the front frame 4 occurs, in the present embodiment by using a shape having a geometric stiffness as shown in Figure 10 as a supporting member 5, avoid such risks are doing.

Embodiment 3 FIG. 11 shows a plan view of a liquid crystal device according to this embodiment. This embodiment combines the embodiments 1 and Reference 2, the locally provided at the four corners of the cell 1 off the support member 5 from the connecting part 12, in the vicinity of the connecting portion 12 of the main frame 11 of the support frame 3 A hole 6 is provided.

According to the present embodiment, the stress wave when an impact is applied to the main frame 11 is equal to that of the first embodiment and the reference example.
2 and is transmitted to the cell 1 via the support member 5 by detouring more largely than in the case of 2 . For this reason, the occurrence of alignment defects in the liquid crystal can be suppressed more reliably.

[0043] (Reference Example 3) FIG. 12 is a longitudinal sectional view showing the structure of a liquid crystal device according to the present embodiment, those reference characters the same in FIG. 1 indicate the same members. The liquid crystal device of the present embodiment, since except for installing the glass plate 2 and the support frame 3 on the upper and lower surfaces of the cell 1 is the same as in Reference Example 1, detailed description will be omitted.

[0044] According to the present embodiment has the further effect of suppressing the occurrence of alignment defects of the liquid crystal in the cell 1.

[0045]

As described above, according to the present invention ,
By keeping a hole 6 in the vicinity of the connecting portion 12 of the main frame 11 supporting region frame 3, it is possible to lengthen the transmission distance to bypass the stress waves transmitted into the cell from the main frame. As a result, the stress wave transmitted to the cell can be sufficiently attenuated, and the occurrence of alignment defects of the liquid crystal cell due to the impact of the main frame can be more reliably prevented.

[Brief description of the drawings]

1 is a longitudinal sectional view showing the structure of a liquid crystal device according to a reference example 1 of the present invention.

Is a plan view showing a structure of a liquid crystal device according to the reference example 1 of the present invention; FIG.

FIG. 3 is a longitudinal sectional view illustrating a structure of the liquid crystal device according to the first embodiment of the present invention.

FIG. 4 is a plan view illustrating a structure of the liquid crystal device according to the first embodiment of the present invention.

FIG. 5 is a plan view showing a support frame used for the liquid crystal device according to the first embodiment of the present invention.

FIG. 6 is a perspective view showing a connection state between a support frame and a main frame in the liquid crystal device according to the first embodiment of the present invention.

FIG. 7 is a plan view illustrating a structure of a liquid crystal device according to a second embodiment of the present invention.

FIG. 8 is a longitudinal sectional view showing a structure of a liquid crystal device according to Embodiment 2 of the present invention.

FIG. 9 is a plan view illustrating a structure of a liquid crystal device according to Embodiment 2 of the present invention.

FIG. 10 is a view showing a support member used for a liquid crystal device according to a reference example 2 of the present invention.

FIG. 11 is a plan view illustrating a structure of a liquid crystal device according to Embodiment 3 of the present invention.

FIG. 12 is a longitudinal sectional view illustrating a structure of a liquid crystal device according to Embodiment 3 of the present invention.

FIG. 13 is a longitudinal sectional view showing the structure of a conventional liquid crystal device.

FIG. 14 is a plan view showing the structure of a conventional liquid crystal device.

FIG. 15 is a plan view showing a support frame used for the liquid crystal device.

FIG. 16 is a plan view showing a main frame used for the liquid crystal device.

FIG. 17 is a perspective view showing a connection state between a support frame and a main frame in the liquid crystal device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 cell 2 glass plate 3 support frame 4 front frame 5 support member 6 hole 10 backlight 11 main frame 12 connection part

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-7-28409 (JP, A) JP-A-9-73072 (JP, A) JP-A-4-214528 (JP, A) JP-A-4- 67013 (JP, A) JP-A-6-148606 (JP, A) JP-A-6-230352 (JP, A) JP-A-7-13144 (JP, A) JP-A 8-129164 (JP, A) Japanese Utility Model 530832 (JP, U) Japanese Utility Model 1-67687 (JP, U) Japanese Utility Model 3-100885 (JP, U) Japanese Utility Model 4-40221 (JP, U) Japanese Utility Model 4-40223 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G02F 1/1333

Claims (4)

(57) [Claims] 1. A cell in which a liquid crystal is sandwiched between a pair of substrates on which electrodes are formed, and glass attached to the cell via an elastic supporting member and disposed so as to cover the cell. Plate, a support frame attached to the glass plate,
A liquid crystal device, comprising: a main frame connected to the support frame; wherein a hole is formed near a connection portion of the support frame with the main frame. 2. The liquid crystal device according to claim 1 , wherein the support members are dispersedly provided in a region apart from a connection portion between the support frame and the main frame. 3. The liquid crystal device according to claim 2 , wherein the support members are provided near four corners of the cell. 4. The liquid crystal device according to claim 3 , wherein the support member has a shape having a geometric rigidity.